678899_778886282882
Step-by-step explanation:
hehw
Work only with the second equation at the beginning. Solve for x for it.
7x - 2x = 3 Combine the left hand side.
5x = 3 Divide by 5
5x/5 = 3/5 Do the division
x = 3/5 = 0.6
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Now work with the top equation.
3(0.6) + 5y = 13 Multiply on the left.
1.8 + 5y = 13 Subtract 1.8 from both sides.
1.8 - 1.8 + 5y = 13 - 1.8 Do the subtraction
5y = 11.2 Divide by 5
5y/5 = 11.2/5
y = 2.24 Answer
Answer: 66
<u>Step-by-step explanation:</u>
20 points per day is the rate, 100 points is the intial amount, and 1420 points is the total.
Use the formula: y = mx + b
- y is the total
- m is the rate
- b is the initial amount
1420 = 20x + 100 <em>plugged the values into the equation</em>
1320 = 20x <em>subtracted 100 from both sides</em>
66 = x <em>divided both sides by 20</em>
Answer:
it's d and c
Step-by-step explanation:
Answer:
44.24
Step-by-step explanation:
Khan academy
